Classes that return today's relationship to deadlines【Angular】

import { Injectable } from '@angular/core';
import * as moment from 'moment';

type DeadlineType = {
    date: string; // YYYY/MM/DD
    time: string; // HH:mm || 'none'
};

@Injectable({ providedIn: 'root' })
export class Deadline {
    isPast(deadline: DeadlineType): boolean {
        const todayTime = new Date().getTime();
        const deadlineTime = new Date(this._formatDate(deadline)).getTime();

        return todayTime > deadlineTime;
    }

    isToday(deadline: DeadlineType): boolean {
        const todayDate = moment().format('YYYY/MM/DD');

        return todayDate === deadline.date;
    }

    isWithinOneWeek(deadline: DeadlineType): boolean {
        const todayTime = new Date().getTime();
        const deadlineTime = new Date(this._formatDate(deadline)).getTime();
        const oneWeekBeforeDeadlineTime = new Date(
            this._formatDateOneWeekAgo(deadline)
        ).getTime();

        return (
            todayTime > oneWeekBeforeDeadlineTime && todayTime < deadlineTime
        );
    }

    private _formatDate(deadline: DeadlineType): string {
        return `${moment(deadline.date).format('YYYY-MM-DD')}T${
            deadline.time === 'none' ? '00:00' : deadline.time
        }:00`;
    }

    private _formatDateOneWeekAgo(deadline: DeadlineType): string {
        return `${moment(deadline.date)
            .subtract(7, 'd')
            .format('YYYY-MM-DD')}T${
            deadline.time === 'none' ? '00:00' : deadline.time
        }:00`;
    }
}